Annual, loosely tufted. Culms ascending, 15–30 cm tall. Leaf sheaths smooth, glabrous; leaf blades 5–14 cm × 3–4 mm, glabrous, smooth or adaxial surface scabrid; ligule 2–3.5 mm, truncate or toothed. Panicle lanceolate to narrowly ellip-tic in outline, 8–12 × 1–3 cm, mostly shortly exserted from uppermost leaf sheath; branches stiffly ascending, usually paired, up to 2.5 cm, bearing several overlapping spikelets. Spikelets elliptic-oblong, 4–5.5 mm, florets 2–5(–7), all fertile; glumes ovate-oblong, lower glume 1.2–2 mm, 1-veined, upper glume 2–3 mm, 3-veined, apex obtuse or acute; lemmas broadly ovate, lowest ca. 3 mm, the upper decreasing gradually, midvein prominent, raised into keel in upper half, other veins inconspicuous, apex obtuse. Anthers ca. 1 mm. Caryopsis ca. 1.5 mm, dark gray. Fl. and fr. Apr–Jul.
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